女性，55岁，发现右乳腺肿物1周，查右乳外上象限肿物1.5cm×1.0cm，质硬，活

阅读理解。                    

     Mr Black worked in a factory of a small town. He had been there for about twenty years before one

day he was sent to the capital for important business. He was very happy because he had never been there before. When he started, he asked his wife and daughters if they wanted him to buy something for them in London. Mrs Black began to think it over and then she said she wished her husband would be able to buy a nice umbrella(伞) for her, and so did their three daughters. As he was afraid he would forget it, he drew an umbrella on his hand. When he reached the station, he found his hands were dirty. He washed them and the drawing was gone.

     On the train Mr Black sat opposite to an old woman. The woman's umbrella was so nice that he carefully looked at it and said to himself not to forget to buy a few umbrellas like it. When the train arrived at the

station in London, he said goodbye to the old woman, took his bag and her umbrella and was going to get off.

    “Wait a minute, sir,” shouted the old woman. “That's my umbrella!”

     Mr Black stopped to look at his hands and his face turned red at once. He said in a hurry, “Oh, I'm

very sorry, madam! I didn't mean it!”

     Seven days later Mr Black left the capital. It surprised the old woman that he sat opposite to her again. Looking at the four umbrellas, the old woman was satisfied with(对……满意) herself. She thought, “I'm

sure I was luckier than the other four women!”

1. Mr Black was _____________.

A. an American

B. an Englishman

C. an Australian

D. a Frenchman

2. Mr Black was happy because _____________.

A. he could buy four umbrellas for his wife and daughters

B. he was sent to do important business

C. he would have a good rest during the seven days

D. he would go to London for the first time

3. Mr Black drew an umbrella on his hand because _____________.

A. he was studying to draw it

B. he was told to buy for them like that

C. he was afraid to forget to buy them

D. his family needed the same colour as it

4. On the train to London Mr Black wanted _____________.

A. to buy four umbrellas like the old woman's

B. to get the old woman's umbrella

C. the old woman to help him choose four umbrellas

D. the old woman to teach him how to choose umbrellas

5. When he had found he had taken the old woman's umbrella by mistake(由于差错),Mr Black felt_____________.

A. sorry

B. unhappy        

C. sad  

D. embarrassed (尴尬)

1）#include < iostream >

2）#include < cmath >

3）using namespace std；

4）double max（double x，doubley）

5）{

6）if（x>y）

7）return x；

8）else

9）return y；

10）}

11）int main（）

12）{

13）doublea，b，c；

14）cout <<" input two numbers：\n"；

15）cin >> a >> b；

16）c=max（a，b）；

17）cout <<" the squart of max imum="<< sqrt（ c ）；

18）}

第17行中的函数sqrt（）在哪个头文件中定义：（）

A.iostream

B.cmath

C.fstream

D.usingnamespacestd；

下列选项中，不属于中国证券业协会的职责的是( )。

A．制定自律规则、执业标准和业务规范，对会员及其从业人员进行自律管理

B．搜集整理证券信息，为会员提供服务

C．监督、检查会员行为，对会员信息披露的诚信状况进行评估和检查

D．制定上市规则、交易规则、会员管理规则和其他有关规则

已知碳酸氢钠在270℃左右就能分解为碳酸钠、水和二氧化碳，而碳酸钠受热不分解，现有某工厂生产出的一批碳酸氢钠中混有少量的碳酸钠，为了测定产品中碳酸氢钠的质量分数，具体的检验步骤如下：

①取一只洁净的坩埚，称其质量为ag；再向其中加入样品。称得总质量为m₁g；

②加热该盛有样品的坩埚；

③将坩埚充分冷却，称量坩埚和剩余固体的质量；

④多次重复步骤②和③至恒重，称得坩埚和剩余固体的总质量为m₂g。

(1)写出碳酸氢钠受热分解的化学方程式_________________。

(2)用_______（填仪器名称）将加热后的坩埚放到__________中（填序号）冷却。

(3)根据题意，用a、m₁、m₂的代数式表示样品中碳酸氢钠的质量分数为_______。

(4)步骤①、③和④都需要用到精度为0.1g的托盘天平称量，若本题中（m₁－m₂）的值超过0.6g，假设样品中碳酸氢钠的质量分数为90%，则至少需称样品_______克。

在评价毒物的危害程度时，下列哪种说法最全面（）。

A.环境监测和健康监护是相互关联的

B.生物监测和健康监护是相互关联的

C.生物检测和健康监护是相互关联的

D.生物监测和健康监护是没有关系的

E.生物检测和健康监护是没有关系的